Indeed (adverb)

1. Used to emphasize the truth of what has just been said.
2. Used to express agreement or confirmation.
3. Used to express emphasis, affirmation, or surprise.
4. Used to emphasize the importance of what has just been said.
5. Used to indicate that what has been said is true or is the case.

Origin:

Late middle english: from in + deed.

Examples:

1. Indeed, that is the case.
2. Indeed, he was right.
3. Indeed, she is beautiful.
4. Indeed, that's what I heard.
5. Indeed, it was a great idea.
6. Indeed, he is one of the best players.